Manual for a Brother Sewing Machine LX 3125

The Brother Sewing Machine LX 3125 is a versatile mechanical sewing machine designed for home use, featuring 25 built-in stitches, automatic 4-step buttonholer, free arm capability, adjustable stitch length and width, built-in needle threader, drop-in bobbin system, and multiple presser feet. Powered by 120V AC, this machine is ideal for basic sewing, decorative stitching, and garment construction. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Unpacking and Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Stitch Selection 7. Basic Sewing Techniques 8. Maintenance & Cleaning 9. Accessories Included 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Mechanical sewing machine body, Foot Control, Power Cord, Accessory Box with presser feet, Bobbins, Needles, and Screwdriver.

Feature	Description
Built-in Stitches	25 stitches including straight, zigzag, stretch, and decorative
Buttonholer	Automatic 4-step buttonhole
Free Arm	Removable flat bed for sewing cuffs and sleeves
Stitch Length	Adjustable from 0-4mm
Stitch Width	Adjustable up to 5mm for zigzag stitches
Needle Threader	Built-in automatic needle threader
Bobbin System	Drop-in top loading bobbin with clear cover
Presser Feet	Includes zipper foot, buttonhole foot, blind stitch foot
Power Switch	On/Off power control
Foot Control	Controls sewing speed

Unpacking and Setup

Unpack and inspect all contents. Place on stable surface at comfortable working height.

Remove machine from packaging: Lift machine by handle, remove protective materials.
Attach power cord: Plug into machine and wall outlet (120V AC).
Install foot control: Connect to machine port.
Wind bobbin: Follow bobbin winding instructions.
Thread machine: Use built-in needle threader for easy threading.

WARNING! Keep fingers away from needle area during operation. Unplug when not in use.

First-Time Operation

Power on machine; follow basic threading and stitching procedure.

Thread machine: Follow numbered threading guide on machine.
Insert bobbin: Drop bobbin into case with thread unwinding counterclockwise.
Select stitch: Turn stitch selection dial to desired pattern.
Adjust settings: Set stitch length and width as needed.
Test sew: Use scrap fabric to test stitch quality.

CAUTION! Always use correct needle size for fabric type. Replace bent or dull needles immediately.

Specifications

Type: Mechanical Sewing Machine
Stitches: 25 built-in stitches
Buttonhole: 4-step automatic
Stitch Length: 0-4mm adjustable
Stitch Width: Up to 5mm for zigzag
Bobbin: Top-loading drop-in system
Needle Position: Left, center, right
Presser Feet: Multiple included snap-on feet
Power Source: 120V AC, 60Hz
Weight: Approximately 13.2 lbs (6 kg)

Controls and Settings

Main controls located on front and top of machine. Stitch Selection Dial: Rotate to select from 25 stitches. Stitch Length Dial: Adjust from 0-4mm. Stitch Width Dial: Adjust zigzag width 0-5mm.

Additional Controls: Reverse Stitch Button, Bobbin Winder, Thread Tension Dial, Presser Foot Lever, Handwheel.

Stitch Patterns: Straight stitch, zigzag, blind hem, stretch stitches, decorative stitches. Buttonhole: 4-step process using buttonhole foot. Needle Positions: Adjustable for different sewing techniques.

Stitch Selection

25 built-in stitches for various sewing applications.

Straight Stitch: Basic sewing (stitch 1)
Zigzag Stitch: Overcasting and decorative (stitch 2-5)
Blind Hem: Nearly invisible hemming (stitch 6)
Stretch Stitches: For knit fabrics (stitch 7-10)
Decorative Stitches: Ornamental patterns (stitch 11-25)
Buttonhole: 4-step process using stitch setting

Tip: Always test stitch on scrap fabric before sewing project.

Basic Sewing Techniques

Fundamental sewing operations for beginners.

Starting to Sew: Lower presser foot, depress foot control gently.
Reverse Stitching: Press reverse button to secure seams.
Changing Direction: Stop with needle down, lift presser foot, pivot fabric.
Zipper Installation: Use zipper foot for precise placement.
Buttonhole Making: Follow 4-step buttonhole procedure.
Free Arm Sewing: Remove accessory tray for sleeves and cuffs.

WARNING! Never pull fabric while sewing - let feed dogs move fabric.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and longevity.

Daily: Remove lint from bobbin area and feed dogs.
Weekly: Oil machine according to lubrication points diagram.
Monthly: Check needle for damage, replace if necessary.
As Needed: Clean exterior with soft, dry cloth.

CAUTION! Unplug machine before cleaning or maintenance. Use only recommended sewing machine oil.

Accessories Included

Standard accessories provided with Brother LX 3125.

Zipper Foot
Buttonhole Foot
Blind Stitch Foot
Button Sewing Foot
Bobbin (4 included)
Needles (assorted sizes)
Screwdriver
Seam Ripper/Lint Brush
Extra Spool Pin

Regulatory Information

UL Listed: Certified for safety standards. FCC Compliance: Meets electromagnetic interference requirements. Copyright © Brother Industries, Ltd. For technical support and service, visit www.brother-usa.com or contact 1-877-467-4289. Machine serial number located on bottom of unit.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Machine not running	Power connection	Check power cord; ensure foot control plugged in; check power switch.
Thread breaking	Tension/needle issues	Rethread machine; check tension setting; replace needle.
Uneven stitches	Threading/tension	Rethread upper and lower threads; adjust tension dial.
Fabric not feeding	Feed dogs	Check feed dog position; clean lint from feed dogs.
Needle breaking	Bent needle/wrong size	Replace needle; ensure correct needle for fabric; check threading.
Bobbin issues	Winding/insertion	Rewind bobbin evenly; ensure bobbin inserted correctly.

Service: 1-877-467-4289; www.brother-usa.com